Table 2.
Structure of the model in model 3
| Stratum | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|
|
X
1
|
0 |
1 |
0 |
0 |
1 |
1 |
0 |
1 |
|
X
2
|
0 |
0 |
1 |
0 |
1 |
0 |
1 |
1 |
|
X
3
|
0 |
0 |
0 |
1 |
0 |
1 |
1 |
1 |
| Probability | 0.300 | 0.176 | 0.563 | 0.391 | 0.563 | 0.096 | 0.794 | 0.836 |
We define 8 strata based on combinations of 3 binary predictors X1, X2 and X3. The conditional probability of success of the outcome Y for each of these strata is given in the table. Outcomes Y are simulated within each stratum using a binomial random number generator with probability of success given in the table.